diff --git a/Dockerfile b/Dockerfile
index 9f666ac..8cad4df 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -12,6 +12,9 @@ COPY mitch.tishmack@gmail.com-55881c97.rsa.pub /etc/apk/keys/mitch.tishmack@gmai
 # install packages
 RUN \
  echo "https://s3-us-west-2.amazonaws.com/alpine-ghc/next/8.0" >> /etc/apk/repositories && \
+ apk add --no-cache --virtual=build-dependencies \
+ 	--repository http://nl.alpinelinux.org/alpine/edge/community \
+	llvm3.7 && \
  apk add --no-cache --virtual=build-dependencies \
 	bash \
 	binutils \